Azo pigments

ABSTRACT

D R A W I N G

United States Patent 2,888,453 5/1959 Schmid et al. 260/174 3,113,938 12/1963 Nakaten et al. 260/204 3,137,688 6/1964 Ronco 260/174 3,366,623 1/1968 Ronco 260/203 3,394,124 7/1968 Ronco eta1.... 260/204 3,402,168 9/1968 Ronco et al.... 260/204 3,472,834 10/1969 Ronco eta1.... 260/203 Primary Examiner Floyd D. Higel Anorneys-Harry Goldsmith, Joseph G. Kolodny, Bryant W.

Brennan and Edward .1. Sites ABSTRACT: A20 dyestuffs of the formula in which R. and R each represents an aromatic radical and R: represents a hydroxynaphthalene radical in which the azo, hydroxyl and carboxylic acid amide groups are in the 1,2,3-position or R represents the radical of an enolised or enolisable ketomethylene compound, and in which one of the radicals R, or R; possesses a group offormula -NHCO- CONHR4 in which R represents a hydrogen atom an alkyl or aryl radical or an azo dyestuff radical are valuable pigments which color rayon and viscose or cellulose ethers and esters in yellow to red shades of excellent fastness to migration.

AZO Momma (1) R, NEN-R,-coNH wherein R, and R, each represents an aromatic or heterocyclic residue and R, represents a hydroxynaphthalene residue in which the azo, hydroxyl and carboxylic acid amide group are in the 1,2,3-position or R, represents the residue of an enolised or enolisable ketomethylene compound, and wherein one of the residues R, and R possesses a group of formula V V v.:N ,V Q-Q "M -Pa V wherein R represents a hydrogen atom, an alkyl or aryl residue or an azo dyestuff residue which is free of acid groups which confer solubility in water, for example a residue of formula wherein R, has the meaning given above and R R R, or R each represents an aromatic or heterocyclic residues.

The present invention also provides a process for preparing the compounds of the above formula I which comprises, a) condensing a carboxylic acid halide of formula R N=.N R,COl-lal with an amine of formula R Nl-l, or b) coupling a diazo or diazoamino compound of an amino of formula R,NH, with an azo component of formula R,CONHR with the components being so chosen that one of the residues R or R possesses a group of fonnula --NHCOCONHR,.

Since the dyestuffs according to the invention are pigments,

groups which confer solubility in water, especially acid groups which confer solubility in water, for example, sulfonic acid or carboxylic acid groups, are of course excluded.

Dyestuffs of especial interest are those of the formula in which X represents a hydrogen or halogen atom or an alkoxy group, X, and X each represents a hydrogen or halogen atom or an alkyl, alkoxy, phenoxy, nitro, nitrile, carboxylic acid ester, aliphatic acylamino or trifluoromethyl group, X, represents a hydrogen or halogen atom or a group of formula -CONHR,,, in which R represents a hydrogen atom an alkyl residue or a phenyl residue which is optically substituted, for example by a halogen atom, alkyl, trifluoromethyl, alkoxy, nitro, cyano, carbalkoxy or alkanoylamino group, X, represents a hydrogen or halogen atom or an alkyl, alkoxy, carboxylic acid ester or phenoxy group, X represents a hydrogen or halogen atom, Y, and Y, each r epresents a hydrogen or halogen atom, alkyl or alkoxy groups, R represents a hydrogen atom, an alkyl group or a phenyl residue which is optionally substituted, for example by a halogen atom, or an alkyl, alkoxy, nitro, carbalkoxy or aliphatic acylamino group, and R represents a hydrogen atom, an alkyl, aryl, amino, alkylamino or arylamino group, or a heterocyclic residue.

Further dyestufis of interest are those which contain enolisable ketomethylene groups which are, for example, 10 derived from an acetoacetic acid arylide or a pyrazolone.

As examples there may be mentioned:

N u i 011300 CH-O ONl-lRaNlIC 0 c ONIIR.

NR1-NHG 0C ONlllh l l CH COCHCONlIRa 01' (4a) cm HQQQ QNHW .ONHRK in which R,, R, and R have the meanings given above, R and R, each represents a benzene residue and Z represents a 30 carboxylic acid amide group.

The following groups may be mentioned from the series of the disazo dyestuffs:

N R1 Rr-N 3s i;

-OH H0- X- -c ONI-IR3NHC 0 c ONIImNHO C- X 40 (6) I|\|IR1NHC O C ONHR1II\II N I l X CONHRa R3HN0C -X (7) 1|11-NHC O C ONH-Ilh N N H H N N I I CHaCOCHCONHR: RaNHCO HCOGH? 01' I'll llii N l Q f CHJCO(5H0ONHRaNHCOCONHRQNHCOCHC OCH:

The disazo dyestuffs of formula (5) may be further described as follows.

A disazo pigment of the formula III X3 i N ll X2 1? NHCOCONH 90- X CONE- 1} NH in which X represents hydrogen, halogen or lower alkoxy, X represents hydrogen, halogen, lower alkyl, lower allcoxy, phenoxy, nitro, cyano, lower carbalkoxy, carbophenoxy, lower alkanoylarnino or trifluoromethyl, X, stands for hydrogen, halogen, lower alkyl, lower alltoxy or trifluoromethyl, X, represents hydrogen, halogen or a group of formula -CONHR in which R represents hydrogen, lower alkyl or phenyl radical which may be substituted by halogen, lower alkyl, alkoxy, or carbalkoxy, nitro or trifluoromethyl, Y and Y each represents hydrogen, halogen or lower alkyl or alltoxy.

The dymtufls of formula (2) or 2a) are obtained if a car boxylic acid chloride of formula in which X, X X X X X and R have the moaning given above is condensed with an amine of fonnula Ina-Gem o o o ONHRQ HrN--NH o 0 R1 wherein Y,, Y R and R have the meanings given above.

The carboxylic acids on which the chlorides of formulas (9) and (9a) are based may be obtained by coupling the diazo compound of an aminobenzene of formula NHC OC ONII Rn with a 2,3-hydr0xynaphthoic acid of formula X- COOH The following may be mentioned as examples of aminobenzenes of formula (1 1): 2-, 3-, or 4-chloraniline, 3,4- dichloraniline, 2,3-dichloraniline, 2,4-dichloraniline, 2,5- dichloraniline, 2,6-dichloraniline, 2,4,5-trichloraniline, 2,4,6- trichloraniline, 2-, 3- or 4-bromaniline, 2,4-dibromaniline,

2,5-dibromaniline, 2-methyl-5-chloraniline, 2-methyl-4- chloraniline, 2-methyl-3-chloraniline, 2-chloro-5- trifluoromethylaniline, 2-, 3-, 4-nitroaniline, 4-chloro-2- nitroaniline, 2-chloro-4-nitroaniline, 4-methyl-3-nitroaniline, 2,4-dirnethyl-3-nitroaniline, Z-methyl-S-nitroaniline, 2- methyl-4-nitroaniline, 2- and -methoxyaniline, 3-chloro-4- methoxyaniline,Z-methoxy-S-nitroaniline, Z-methoxy-S- chloraniline, Z-methoxy-S-trifluoromethylaniline, 2-amino-4- trifluoromethyl-4'-chlorodiphenyl ether, 2-nitro-4-ethoxyaniline, 2-amino-4-chlorodiphenyl ether, 2-amino-24- dichlorodiphenyl ether, 2-amino-4,4-dichloro-diphenyl ether, l-aminobenzene-Z-carboxylic acid methyl ester, 1- aminobenzene-Z-carboxylic acid ethyl ester, l-aminobenzene- 2-chloro-5-carboxylic acid methyl ester, 2-amino-5- nitrobenzoic acid methyl ester, 4-amino-3- nitrobenzotzifluoride, 2-amino-5-nitrobenzotrifluoride, l-

amino-Z-methylbenzene-S-carboxylic acid methyl ester, 1- amino-2-chlorobenzene-5-carboxylic acid methylamide, 2- amino-4-trifluoromethyl-diphenyl ether, 4-methyl-3- aminobenzoic acid amide, 4-chlor-3-aminobenzoic acid amide, 2,4-dichlor-S-aminobenzoic acid amide, 4-methoxy-3- aminobenzoic acid amide, 4-methyl-3-aminobenzoic acid-2' chloro-S-trifluoromethylanilide, 4-chloro-3-aminobenzoic acid-2',5'-dichloranilide, 4-chlor-3-aminobenzoic acid-2'- chloro-S '-carbomethoxyanilide, 4-chlor-3-aminobenzoic acid- 3-chloranilide, 4-chlor-3-aminobenzoic acid-2'-chloro-$- trifluoromethylanilide, 4-chlor-3-aminobenzoic acid-3'- trifluoromethylanilide, 4-chlor-3-aminobenzoic acid-3 ,5 '-bistrifluoromethylanilide, 4-chlor-3-aminobenzoic acid-2,4',5-

trichloranilide, 2,4-dichlor-5-aminobenzoic acid-2 ,5 dichloranilide, 2,4-dichlor-5-aminobenzoic acid-TA,- dichloranilide, 2,4-dichlor-5 -aminobenzoic acid-3 dianilide, 3-amino-4-methoxy-3'-triiluoromethyl oxalic aciddianilide, 3-amino-4-methyl-oxalic acid-dianilide, 3-amino-4- methyl-3-chlor-oxalic acid-dianilide, 3-amino-4-chloroxalic acid-dianilide, 3-amino-4-methoxy-phenyloxarnide acid ethyl ester, and 4-amino-2,5-dimethoxy-oxalic acid-dianilide.

The resulting azo dyestuff carboxylic acid is treated with a reagent which is capable of converting a carboxylic acid to its halide, for example chloride or bromide, for example, especially with a phosphorus halide, for example, phosphorus pentabromide or phosphorus pentachloride or phosphorus trichloride, a phosphorus oxyhalide and preferably with titlenyl chloride.

The treatment with such acid-halogenating reagents is ap propn'ately carried out in an inert organic solvent, for example, dimethylfonnamide, a chlorobenzene, for example monochlorobenzene or dichlorobenzene, toluene, xylene or nitrobenzene, and in the case of the five last-named solvents,

optionally with the addition of dimethylformsmide. In the manufacture of the carboxylic acid halides it is generally advantageous first to dry the azocompounds manufactured in an aqueous medium or to free them of water azeotropically by v boiling in an organic solvent. This azeoptropic drying can, if

desired, be carried out immediately prior to the treatment with the acid-halogenating agents.

I The azo dyestuff carboxylic acid chloride obtain E5565 densed with amonoamine of formula l-l,NR,Nl-l- COCONH-L, especially those of formula (l0) or (100), or

with a diamine of the formula H,N-it, mrcocoNa-n, '-Nl-l,.

The following amines may be mentioned as examples: 4-

4,4'-diamino-3-methyl-oxalic aci'd-dianilide, 4-,4-'-diaruint)-3,3

'-dimethyloxalic acid-dianilide, tetramethyloxalic acid-dianilide,

4,4'-diamino-2,2',5,5 4,4'-diamino-2,2',5,5'-

'tetramethoxyoxalic acid-dianilide, 4,4-diamino-2,2',5,5'-

tetrachloroxalic acid-dianilide, 4,4-diarnino-2,5-dirnethoxyoxalic acid-dianilide, 4,4'-diamino-2,5-dimethyl-oxalic acid:

dianilide, 4,4'-diamino-2-methoxy-5-chlor-oxalic acid-dianilide, 3,3'-diamino-,4,4'-dimethyl-oxalic acid-dianilide, 3,3- diamino-oxalic acid-dianilide, 3,3'-diamino-4,4'-dimethoxyoxalic acid-dianilide, 3,3'-diamino4-methoxy-oxalic acid-dianilide and 3,3-diamino-4-methyl-oxalic acid-dianilide.

These amines may be obtained according to known processes, for example, by condensation of a nitrophenylamino oxalic acid ester with an aniline derivative and the catalysed reduction of the resulting nitro compound.

The condensation of the carboxylic acid halide of the type initially mentioned and the amine is appropriately effected in an anhydrous medium. Under these conditions it generally takes place surprisingly easily even at temperatures which lie within the boiling range of normal organic solvents, for example, toluene, monochlorobenzene, dichlorobensene, trichlorobenzene and nitrobenzene. In order to accelerate the reaction it is generally advisable to use an acid-binding agent,

for example, anhydrous sodium acetate or pyridine. The,

resulting dyestuffs are in part crystalline and in part amorphous and are in most cases obtained in very good yield and in a pure state. It is appropriate first to separate off the acid chlorides obtained from the carboxylic acids. In some cases a separation of the acid chlorides can however be dispensed with without doing harm and the condensation can take place immediately following the manufacture of the car- Le y iqssiqsh gri s r.

According to embodiment (b) of the process according to the invention, the new dyestuffs are obtained if a diazotised aromatic amine, especially a diazotised aminobenzene of formula H,N--R is coupled with an aao component of formula s eepwear-M, s a

Aminobenzenes of formulas (ll) and (lla) may be espes sflxmsatuaqssfii s sm The coupling takes place by gradual addition of the aqueous-alkaline solution of the coupling component to the acid solution of the diazonium salt. The coupling is suitably effected at a pl-l-value of 4 to 6. The pH-value is advantageously adjusted by adding a buffer. Possible buffers are, for example the salts, especially alkali salts, of formic acid, phosphoric acid or especially acetic acid. The alkaline solution of the coupling component advantageously contains a wetting agent, dispersing agent or emulsifier, for example an aralkyl l sulfonate for example, dodecylbenzcnesulphonate or the sodium salt of l ,l '-naphthylmethanesulphonic acid, polycondensation products of alkylene oxides, for example, the product of the action of ethylene oxide on p-tert-octylphenol, and furthermore alkyl esters of sulphoricinoleates, for example n-butylsulphoricinoleate. The dispersion of the coupling component can also advantageously contain protective colloids, for example, methylcellulose or minor amounts of inert organic solvents which are sparingly soluble or insoluble in water, for example optionally halogenated or nitrated aromatic hydrocarbons, for example, benzene, toluene, xylene, chlorobenzene, dichlorobenaenes or nitrobenzene, as well as aliphatic halogenated hydrocarbons, for example carbon tetrachloride or trichlor-ethylene and furthermore organic solvents which are miscible with water, for example, acetone, methyl ethyl lre tgne, methanol, ethanol or isopropanol.

The coupling can advantageously also be performed by .tinuouslycombining an acid solution of the diazoniurn salt .;with an alkaline solution of the coupling component in a mix- ;ing node, whereupon coupling of the components takes place immediately. The resulting dyestuff dispersion is continuously withdrawn from the mixing nozzle and the dyestuff is separated off by filtration.

The aryldiazoarnides to be used according to embodiment (b) of the process according to the invention are obtained according to a process known per se by reacting an aryldiazoniurn salt with a primary or preferably with a secondary amine compound. Many amines are suitable for this purpose, for example aliphatic amines, for example, methylamine, ethylarnine, ethanolamine, propylamine, butylamine, hexylamine and especially dirnethylamine, diethylamine, gdiethanolarnine, methylethanolamine, dipropylamine or dibutylamine, amino-acetic acid, methylaminoacetic acid, buatylamino-acetic acid, aminoethanesulphonic acid, ;methylamine-thanesulphonic acid, guanylethanesulphonic acid, fi-aminoethylsulphuric acid, alicyclic amines, for example, cyclohexylamine, N-methylcyclohexylamine, and ,dicylohexylamine, aromatic amines, for example, 4- aminobenzoic acid, sulfanilic acid, 4-sulpho2-amino-benzoic acid, (4-sulpho-phenyl)-guanidine, 4-N-methylaminobenzoic acid, 4-ethylaminobenzoic acid, l-aminonaphthalene-4sulfonic acid, l-aminonaphthalene-2,4-disulfonic acid, heterocyclic amines, for example, piperidine, norpholine, pyrrolidine or dihydroindole and finally also sodium cyanamide or qisxa im ei As a rule the diazoarnino compounds obtained are sparingly soluble in cold water and can be separated 08 from the reaction medium in a crystalline form, after salting-out where appropriate. in many cases the moist press cakes can be used for the coupling. In some cases it can prove appropriate to dehydrate the diazoamides before the reaction by vacuum drying.

The coupling of the daizoamino compound with the coupling component takes place in an organic solvent, for example chlorobenzene, o-dichlorobenzene, nitrobenzene, pyridine, ethylene glycol, ethylene glycol monoethyl ether or monomethyl ether, dirnethylformamide, formic acid or acetic acid. When using solvents which are miscible .with water it is however not necesary to use the diazoamino compounds in the anhydrous form. The water-moist filter cakes may be example be used.

The coupling is suitably effected with warming, preferably at a temperature within the range offrom 80 to 180 C., in an j acid medium and generally takes place very rapidly and completely. lfneutral solvents are used then the addition of an acid, for example hydrogen chloride, sulfuric acid, formic acid or acetic acid is advantageous. As a result of their insolubility "the resulting pigments can be isolated from the reaction mixture by filtering them oil. A post-treatment with an organic solvent, as is required in the case of pigments which are obtained by the aqueous coupling method, is therefore unnecessary in most cases.

The new dyestufl's are valuable pigments which are useful for a large number of pigment applications, for example in a finely divided form for the coloring of rayon and viscose or cellulose ethers and cellulose esters, or of super polyarnides or super polyurethanes or polyesters in the spinning composition, as well as for the manufacture of colored lacquers or lacquer forming agents, solutions or products of acetylcelluloae, nitrocellulose, natural resins or synthetic resins, for example,v

polymerization resins or condensation resins, for example aminoplasts alkyd resins, phenoplasts, polyolefines such as polystyrene, polyvinyl chloride, polyethylene, polypropylene for polyaerylonitrile, rubber, casein, silicone and silicone resins. They can furthermore advantageously be used in the manufacture of crayons, printing inks, cosmetic preparations or laminated sheets.

Compared to the dyestufis of US. Pat. 1,974,550, which contain a carbanilide groups instead of an oxanilide group, the dyestufls according to the invention are distinguished by, better fastness to migration.

The following Examples illustrate the invention;

In the Examples which follow the parts, unless otherwise= specified, denote parts by weight and the percentages denote P llli f l y .Fl lL-.. MI.

EXAMPLE 1 16.2 parts of diazotised 2,5-dichloraniline are coupled with 18.8 parts of 2,3-hydroxynaphthoic acid in the usual manner. The resulting azo dyestuff is dried and then converted to the am dyestufi carboxylic acid chloride by means of thionyl chloride in o-dichlorobenzene.

7.6 parts of this monoazo dyestuff carboxylic acid chloride are stirred with 200 parts of o-dichlorobenzene and a hot solution of 5.5 parts-of 4-amino-oxalic acid dianilide in 150 parts of o-dichlorobenzene is added. The temperature of the mixture is to C. It is warmed to 140 C. during 1 to 1% hours and stirred for 8 hours at 140 to 145 C. It is then allowed to cool to 100 C., filtered, and the product is washed with 500 parts of hot o-dichlorobenzene, then with 200 parts .of cold methanol and finally with hot water and dried in vacuo -at to C. ilisi sa laiew effs evle is a red finely crystalline powder which is sparingly soluble to insoluble in the usual organic solvents.

Plastics, for example, polyvinyl chloride and lacquers are colored in brilliant red shades having very good fastness to migration, overstripe bleeding and light.

The Table which follows describes further monoazo pigments which are obtained. if, following the process described in paragraph I, 1 mol of the diazo compound of the amines mentioned in column I is coupled to l mol of the 2,3-hydroxynaphthoic acid mentioned in column ll, and the resulting monoazo dyestufl carboxylic acid is converted to the acid chloride and condensed with 1 mol of the amine mentioned in column Ill. Column lV describes the color shade of a polyvinyl chloride foil colored with the resulting pigment.

III

I II IV 2,3-hydroxynaphthoic acid. 4-amino-4-chloroxallc aeid-dianilide Red.

do 4-amino-2,4-dich1or-oxalic acid-dianilide Red. 4-amino-4 methoxy-oxalic acid-dianilide Red. 4-amino-4-methyloxalie acid-dianlllde Red. 4-amino-2chloroxalic acid-dian'llide. Red.

. 4-amino-2,6-d1ch1or-oxa1ic acid-dianilid Yellowishtinged red. 7 "d0 .do 4-amin0-2,5-dlmethyl-oxa1ic acid-dlanllide BluldSh-tinged re 4-amino-2,5-di-methyl-4-chloroxalic acid-dianllide. Red. ..do. 4-amin0-2,6-dimethoxy-oxallc acid-dianlllde. Blurdsh-tinged re 4-amin0-3-methyloxallc acid-dianilide. geg. o e 4-amlno-oxalic acld-dianilide Red.

4-amino-2,5'-dlehlor-oxalic acid-dianillde 4-amino-2,li-dimethyl-oxallc acid-dianillde 4-amin0-3-trifluoromethyloxalic aeid-dianilid tinged red. 6 2-chlfiro-5-trifluoromethyldo 4-amino-oxalic acid-dianllide ca letan me. 17 do do -amino-N-chloroxalic acid-dlanlllde Do. 18 do do 4-amino-2,6-dlmethoxy-W-ehloroxallc acld-dianiiide YtzllOWliShmge Red. 19 4-rlfluoromethyl-2-nitroanido 4-amin0-0xallc acid-dianilide Orange,

me. 20 Z-methyl-fi-chloraniline do Searlet. 21.. 2,4,6-trichloraniline.. Red. 22 2-chlorani1ine Yellowishtinged red. 23 4-mcthoxyaniline do do Yellowish tinged red. 24 4-chIor-3-aminobenzoic acid .do do Yellowishmethyl ester. tinged red. 25 do do 4-amlno-4'-chloroxallc acld-dlanlllde Yellowlshtinged red. 20. 4-methyl-B-uminobenzolc .do do Red.

ucld ethyl ester. :27 do 4-amino-oxallc acld-dlanllide Red.

Yellowishfin rna l-h I I II III IV 29 4-methoxy-3-aminobeuzoic .do 4-amino-oxalic aeid-dianilide Bluish-tinge l acid methyl ester. red. 30 4-methyl-3-eminobenzoic ..d0 ..do Red.

acid phenyl ester. 31 4-methoxy-2-nitroaniline .do Red. 32 4-methyl-3-aminobenzoic .do ifluoromethyloxulic aeld-dianillde Yellowishacid phenyl ester. tinged scarlet. 33 ..do .do N-(4-aminophenyl)-oxelic acid dlamide Scarlet. 34 -chlicfi'f-aminobenzoic aeiddo 4-amin0-oxa lc aclddlanl1ide Red.

an e. 35 .d0 do 4-emin0-2,5-dimethyl-oxalis aciddinellidc Red. 36 4-chlnr-3-aminnbenzoic ncidl0 4-amino-oxallc acid-dianillde Red.

2, '-(lichlornnilld(-.. v 37 .dn ..d0 4-amln0-4-carb0methoxyoxallc acid-dianilide Yellowislitinged red. 38.0.... 4-clrlor-3-nmlnobenzoic u(-.l l-3- .(l0 i-amino-oxalic acid-dianilide Scarlet.

trliluoromethylanilide. 3!! ..d0 "do N-(4-uminophenyD-oxalic acid diamide Do. '40 do 4-nminc-2,5-di-ehlor-oxalic acid-dianilide Red. 41 do 4-nminc-2,5-di-methyl0xalic acid-dianilide Red. 42 do 4-aminc-2,6-di-methoxyoxallc acid-dianlllde Red. 43 do 4-mllll10-2,5-(1l-clllOt0-4-methyl0xnlic acid-dinnllide... Red.

44 4-metliyl-3-arninobenzoie .(lo 4-111nine-2,5-di-methyloxullc ueid-dlanillde Rod.

acid-3-trlfluoromethylanllidc.

d do 4-nml110-2,6-di-chloroxulie neid-dianllide Red 4-amInc-2,5-di-chloroxallc acid-dianillde Red. 4-mnino-oxnlic acld-dimiilide. Red. 2,4-dichlorobenzoic .do Yellowishacid-2,l5'-dlchloranilldu. tinged scarlet.

d .do 4-umino-3-trifluorometliyloxalie acid-dianilide Do. .do. 4-umin0-2,6-dlmethyl-oxalic aeid-dlanilide Scarlet.

N-(4-aminopl1enyl)oxalic acid dlamlde. Reddish-tinged orange.

52 4-methoxy-3-aminobenzoic do 4-amln0-2,5-dimethyl-oxalic acidiiianiiide Bluish-tinged acid-3-trifiuoromethylred. anilide.

53 .do .do taminobxalic acld-dianilide 54 4-methoxy-3-aminobenzolc .do ..d0

acid-2-ch1oro-5-trlflu0romethylanllide.

65 4-chlor-3-aminobenzoic acid- ....do...

3-carbomethoxyanilide.

56 2,5-dichloraniline 6-bromo-2,3-hydroxydo Red.

naphthoic acid.

57 do 6-methoxy-2,3-hydroxy- ...do Bluish-tinged naphthoic old. red.

58 4-chlor-3-aminobenzoic acid- 6-bromo-2,S-hydroxynaphthoic ..do Red.

3-trifluor0methylanilid0. acid.

59 .do 6-methoxy-2,3-hydroxydo Bluish-tingcd naphthoic acid. red.

60 4-methoxy-3-aminobenzoic do .d0 Ruby.

acid-3-trifiuoromethyl I anilide.

61 5-chloro-2-methoxy-aniline... 2,3-hydroxynaphthoic acld... 41amine-2,fi-dimethyl-4-methoxy-oxalic acid-dlanilide Bluiish-tingcd 62. 5-nitro-2-methoxy-aniline .do -do D0.

63. .d 4-arnlno-2,B-di-methyl-oxalic acid-dianilide. Do.

64. ..-do. 4-amin0-oxalic acid-dianiiide Do.

65. fi-chloro methoxy-aniline ..do 4-amino-4-methoxy oxalic acid-dianilidc Do.

66... 4-nitro-2-mcthoxy-anlline ..do... ..do Ruby.

67... .do o... N -(4-amino-phenyl)-N-a-naphthyl)oxalic acid diamide... Do.

68"... 5-chloro-2-methoxyaniline do ..do Bluigh-tingcd 60 4-methyl-3-aminobenzoic acid- .....d0 4-amino-4 chloroxalic acid-dianilide Red.

2,5-dichloroanilide.

EXAMPLE 2 100 parts of o-dlchlorobenzene and warmed to 80-85 C. A

50 7.7 parts of the dyestufl from 1 mol of diazotised 3-amino-4- s, 3 2 g of i j i chlorobenzoacid d l l of box ox rc acl iamlrde in parts 0 o-d1chloro nzene IS en w an mo 1 me y c or added and the mixture then warmed to l-l45 C. for 12 acetoacetylaminobenzene of formula hours. The resulting pigment l8 filtered off while hot, and

0 washed with hot o-dichlorobenzene until the filtrate issues (30H! O colorless. The dichlorobenzene is then displaced with cold 01 methanol and the material finally thoroughly rinsed with hot (EEG-NH: E I water. After drying at to 90 C. 7.1 parts of a sofl powder OCH N=N are obtained; this is substantially insoluble in the usual so]- 60 vents and on milling into polyvinyl chloride yields lively yellow 0 00H shades having good fastness to migration and light. The pigment corresponds to the formula are stirred with 460 parts of mdxchlorobenzene and 0.5 part of dimethylformamide and warmed to 7590 C. 2.85 parts of 3 thionyl chloride are allowed to run in at this temperature dur- ()0 ing 5 minutes and the mixture is stirred for a further 2 hours at l20 to 130 C. The end of the reaction is recognizable by the fact that the hydrochloric acid evolution ceases and that a CHa sample shows uniformly yellow needles under the microscope. CH3 The mixture is allowed to cool to 30 C. and the product is fill tered off and washed with 200 parts of benzene and then with C 3 H0 0C ONHC -Cl 150 parts of petroleum ether. After drying at 50 to 60 C. in l vacuo 7.1 parts of the dyestuff acid chlorides are obtained as a yellow crystalline powder. 4.8 parts of the acid chloride obtained above are stirred with 0.2 part of thionyl chloride in 01 The Table which follows describes further monoazo pigments which are obtained if, following the process described in paragraph 1,1 mol of the diazo compound of the aminocarboxylic acid mentioned in column I is coupled with 1 mol of as well as lacquers in excellent brown shades which are fast to light, migration and overstripe bleeding.

The pigment corresponds to the formula the acetoacetyl compound of the amine mentioned in column 5 ll, and the monoazo dyestuff carboxylic acid obtained is con- I verted to the acid chloride and condensed with 1 mol of the amine mentioned in column lll. Column lV describes the II color shade of a polyvinyl chloride foil colored with the result- N ing pigment.

Oll (|)Clia EXAMPLE 3 (JONII NllCOCONll 15.8 parts of the dyestuff from 1 mol of diazotised 2-chloro- S-tritluoromethylaniline and 1 mol of 2,3-hydroxy-naphthoic 0 H; acid are stirred with 180 parts of benzene and 0.5 parts of dimethylfonnamide and warmed to 75 C. 6.7 parts of thionyl m chloride are allowed to run in at this temperature during 5 minutes and the mixture is stirred for a further 2 hours at 75 N C, whereupon the whole material dissolves. After the reaction mixture has cooled, the uniformly crystalline monocarboxylic "F3 acid chloride of the dyestufi' is isolated by filtration and is washed with 150 parts of benzene and then with 200 parts of N H3 11 0 petroleum ether. After drying in vacuo at 50 C. 13.7 parts of the dyestufi acid chloride are obtained as a red crystalline powder. 4.2 parts of this chloride are stirred with 300 parts of I C" o-dichlorobenzene and warmed to 80-85 C. A hot solution I II III IV 69 4-chlor-3-aminobenzoic acid. 2,fi-dlmcthoxy i-clllorailine. 4-amino-oxalic acid-dianilldc Yellow.

d0 .d0 -aminol chloroxalic acId-dianillde D0- 4-amino-3-mcthyl-2,5-dichlor-0Xallc acld-dianilidc D0. 72 do .-do 4-amlno-2,5-dichlor-oxalic acld-dianillde ll -fl s yo 0W. 73 "do .do 4-amlno-2,5-dimethy]-3-chloroxalic acid-dianilidc ed hs n ye 0W. 74 "do 2-methoxyaniline do D0. 75.. d0 2,6-dimothoxy-4-br0munllIne d0 Do. 76- -chlor-3-aminobenzolc 210111.... 2,6,-dlmcthoxy-4-bromanillne. 4-nmin0-oxulic acld-dlanllido Ycllow. 77.. d 2-naphtylamlnc 4-nmInn-2,5-dlmcthyl-oxalicacld-dlanlllde D0- 8 d 4-n'min0-oxnlicnclddllunllldmfl. D0 79"-.." fi-amiilo-ilfl-d1 =hlorobonzolc "do d0 D0.

110 80 d0 2,5-dlmetlloxy-4-chlorm1lline. do Do. 8 .d0 ..do.... 4-um1110-2,5-d1mothoxy-4-chloroxalic acid diunllido ltcdfilsh-tlng d ye ow. 82 4-meitihyl-3-aminobcnzoic 2,6-dlmcthoxy-4-chlorunllinc.. 4-aml110-2,fi-dimnthoxy-4-chlor-oxallc ricld-diunilld0- Do.

of 1.95 g. of 4,4'-diamino-2,2',5,5'-tetramethoxyoxalic-dianilide in parts of o-dichlorobenzene is then added and the mixture warmed to l40-l45 C. for 12 hours. Thereafier the finely crystalline sparingly soluble pigment is filtered off while hot and washed with hot o-dichlorobenzene until the filtrate issues colorless, and is then washed with cold methanol and finally with hot water. After drying at to 85 C. in vacuo 4.4 parts of a soft powder are obtained; this is substantially insoluble in the usual solvents and colors polyvinyl chloride foil 50 acids mentioned in column II, and the resulting monoazo dyestuff carbosylic acid is converted to the acid chloride and condensed with 1 mol of the diamine mentioned in column lll. Column IV describes the color shade of a polyvinyl chloride foil colored with the pigment obtained.

I II III IV 83. 2,6-dicl1l0rani1ine 2,3-hydroxy-naphthoic acid 4,4-dimethyl3,3-diamino-oxalic ucid-dianilidc Red.

d0 do 4,4-dimethoxy-3,3-diamino-oxalic acid-dianilidc Brown.

4,4'-diamino-2,2,5,5'-tetramethyl-oxalic acid-dianillde Red. 4,4-dlamina-2,fi-diethoxy-oxalic acid dianilidc Rcddish brown. 4,4-diamino-Zi-methyl-oxalic acid-dianilide Red.

,3-hydroxy- 4,4-diamino-2,2,5,5-tetracthoxyoxalic acid-dianilide Brown. naphthoic acid. 89 2-chloro-5-trifiuoro- 2,3-hydroxy-naphthoic acid d0 D0.

methylaniline. 90 do do 4,4-dimethyl-3,3-diamino-oxalic acid-dianilido Red.

410.. do 4,4-diamino-oxalic acId-dianilide Orange. d0 do.- 4,4-diamino-2,B-dimethoXy-oxalic acid-dianilide Brown. trichloranilinc do do Do. 0 A do 4,4-diamino-2,2-5,5-tcttg1mcthoxy-oxalic acld-diani1ide. Do. do. .do. 4,4-diamino'2,2,5,5-tctramethyloxalic acid-dianilide Rcddlsll-brown. 96 4trifiuoro-methyl-2- .do o Do.

nitroaniline. 97 do .do 4,4-diamino-2,2,5,6-tetramethoxy-oxalic acld-dianilide. Ygllowish rown. 98 d0 d0 4,4-diamino-2,2,6,6-tetrachloroxalic acld-dianilidc Scarlet.

5-chloro-2-Inethylaniline .do. 4,4-diamino-oxalic aciddianilide Red. 100 Anthranilic acid methyl ester .do do Brown 101 ..do do 4,4-diamino-2,2,5,5-tetra.methyl-oxalic acid-dianilidc. Brownrdsh-d tinge re 102 4-Chlor-3-amlnobenzoic acid ..do 4,4-diamino-2,2,5,5-tctramcth0xy-oxalic acid-dianilidc... BroWnish-rcd.

methyl ester.

4.3 parts of 4-m thoxy-3-amino-oxalic acid-dianilide are diazotised in the usual manner using glacial acetic acid and EXAMPLE 5 3.6 parts of diazoamino compound of formula OCH;

(manufactured by reacting diazotised 4-methoxy-3-amino-oxalic acid-dianilide with piperidine in an alkaline medium) and 3.6 parts of 4(-2'-hydroxy-3'-naphthoylamino)-5-ch|oro-2- methoxy-l-benzoylaminobenzene are suspended in 250 parts 31 2 z a l i i gfi a gf 23 the 5 of o-dichlorobenzene, warmed to 70-75 C. and mixed with g y foxy- I z i l 20 parts of glacial acetic acid. The mixture is now stirred for a y 58 12: s further 2 hours at 120 to 130 C., whereby the decomposition ga 0 t o e 5 d i 0 er h Pa 1d of the diazoamino compound and the coupling to give the pigg gr S reggth mm so :2 e Co ment is completed. The red pigment is filtered off while hot, g f ensanonlp? i d g: y 2 3 l0 and rinsed with hot o-dichlorobenzene, cold methanol and hot mo 0 p'ten'octy p eno 5 e o e so u an water. After drying in vacuo at 80 C. a bluish-tinged red the naphthol subsequently precipitated with 30 percent monoazo dyestuff of fonnula strength acetic acid with good stirring at a pH-value of 6.0 to 6.5. Coupling is effected by adding the diazo solution described above while maintaining a pH-value of subsequently l5 0 (:11a to 6.5 and a temperature of to 30 C. by adding soda solution. In order to complete the coupling the mixture is further stirred for 1 hour at the same temperature and the resulting H pigment suspension is rendered acid to Congo Red by adding I NHC 0 CONE-Q hydrochloric acid and filtered. The product is washed with hot 20 Cl water until no further chloride ions are detectable in the filtrate. After drying at 80 to 90 C. in vacuo, 8.5 parts of the red pigment dyestuff of formula (|)O Hz 0 CH1 N i Q is obtained in a good yield. The pigment is sparingly soluble l NHO 0C ONE- 3 to insoluble in the usual solvents and colors polyvinyl chloride CH3 in red shades which are fast to light, overstripe bleeding and L migration. 0 ONHNHC o-Q EXAMPLE 6 (1H 3 1.9 parts of 3,3-diamino-4,4-dimethyl-oxalic acid-dianiare obtained. This is sparingly soluble to insoluble in the usual lide are tetrazotised in the usual manner by means of glacial solvents and colors polyvinyl chloride foil and lacquers in acetic acid and aqueous hydrochloric acid, ice and sodium bluish-red shades having good fastness to migration, nitrite. overstripe bleeding and light. On the other hand 3.5 parts of 2,5-dimethoxy-4-chlor-l- The table which follows describes further monoazo pig- 40 acetoacetylaminobenzene are dissolved in a mixture of 300 ments which are obtained if, following the fourth process parts of water and 6.5 parts of 30 percent strength sodium described, 1 mol of the diazo compound (or 2 mols for hydroxide solution. 1 part of the condensation product of 8 bisacetoacetyl compounds) of the amines mentioned in mols of ethylene oxide and 1 mol of p-tert.-octylphenol IS column I are coupled with 1 mo] of the coupling components added to the solution and the naphthol is subsequently: of the 2,3-hydroxynaphthoic acidor acetoacetyl-arylidenes precipitated with 30 percent strength acetic acid at a pH-value s mentioned in column 1!. Column 111 describes the color shade of 6.0 to 6.5 and with good stirring. Coupling is effected y adof a polyvinyl chloride foil colored with the resulting pigment. ding the diazo solution described above, while maintaining a I II III 103 4-methoxy-3-amlno-oxalic acid-dianlllde 4-(2-hydroxy-3-naphthoylamlno)-1-benzoyl- Red.

aminobenzenc. 104 do 4-(2-hydroxy-3-naphthoylamino)-2,5-dimetl1oxy- Bluish-tlnged 1-(4"-chloro)-benzoylamlnobenzene. rod. 105 do Z-hydroxy-S-naphthoic acid anllide Red. 106 do 2-hydroxy-3-naphth0ic acid-fl-napthylamide. Bluish-tinged 107 .do 2-hydroxy-3-naphthoic acid-2,4'-dlmethoxy-5- "in.

chloranlllde. 108 4-rtiiiiegiifiiay-3'amino-2 ,5-dichlor-oxal1c acid- .do Do.

a e. 109 Inglistifipay-ii-amino-3-trifluoromethyl-oxalic acld- Z-hydroxy-B-naphtholc acid-a-naphthylamido Do.

an e. 110 4-methy1-3-amino-oxalic acid-dianillde do Red. 111 4-methoxy-3-amino-oxa1ic acid-dianillde 4-(2-hydroxy-3-naphthoylumino) l-benzoyl- Red.

amlnobenzene. 112 4-methyl-3-amino-2.5-dlchlor-oxalic aciddo Red.

dianilide. 113 4-chlor-3-amino-oxa1ic acid-dianillde d0 Scarlet. 114 do 2-hydroxy-3-naphtholc acld-anilide Red. 115 5-amino-2,4-dichloro-2,5-dichlor-oxalic acld- .do Red.

dianilide. 116 N-(4-methoxy-3-aminophenyl)-0xalic acid- .do Blulsh-tinged diamide. red.

pH-value of 6 to 6.5 and a temperature of 20 to 30 C. by adding soda solution. In order to complete the coupling the mixture is stirred for a further hour at the same temperature and then another hour at 70 to 80 C., and the resulting pigment suspension is rendered acid to Congo Red by adding hydrochloric acid and is filtered OH. The product is washed with hot water until no further chloride ions are detectable in the filtrate. After drying at 80 C. in vacuo 5. 0 parts of the yellow pigment dyestuff of formula O OH; I OH; CH;

l l l OCH;

OCH:

are obtained. lThi lsparingly soluble toinsolulgle in the usual sq vc s qqlpr ml evinyl rids l and assl in y low shades of good fastness to migration, overstripe bleeding and light.

EXAMPLE 7 CONH NHCOCONII 0C- in which [34, X X X Y and Y have the meanings given in claim 2].

in which X represents hydrogen, halogen or lower alkoxy,

X, represents hydrogen, halogen, lower alkyl, lower alkoxy, phenoxy. nitro, cyano, lower carbalkoxy, carbophenoxy, lower alkanoylamino or trifluoromethyl, X, stands for hydrogen, halogen, lower alkyl, lower alkoxy or trifluoromethyl, X represents hydrogen, halogen or a group of formula CONHR,, in which R, represents hydrogen, lower alkyl or phenyl radical which may be substituted by halogen, lower alkyl, alltoxy or carbalkoxy, nitro or trifluorornethyl, Y, and Y, each represents hydrogen, halogen or lower alkyl or alkoxy. 2. The compound of the formula N- ll N CONll 2113 on; no

NllCOCONll 

2. The compound of the formula 